Alpha Technologies VMX Series - Manual (Page 13)

13 017-940-B0-001, Rev. A
1.0 Introduction to the VMX Power Supply, continued
1.1 Connections Overview
Below is a brief description of each terminal.
Connections:
• AUX OUT (Auxiliary Output): The Auxiliary Output is an uninterruptible supply of power
that can be used to power external devices such as cable modems or ethernet hubs. The
auxiliary output is rated at 220V 150W and uses a 2A 250V fast blow fuse (Alpha P/N
460-157-19).
• LRI (Local/Remote Indicator): The LRI lamp option connects to the LRI ± terminals on
the terminal block. The LRI circuit is rated at 12Vdc, 250mA. This option duplicates the
function of the red ALARM LED by illuminating an externally mounted red lamp.
• Voltage Out: The Protective Interface Module (PIM) allows the VMX Uninterruptible
Power Supply to provide programmable current limits for four output channels. The
Service Power Inserter (SPI) connects into the Voltage Out terminals.
• Ground: A ground wire (up to 6 AWG) can be connected to the ground lug to
permanently tie the chassis to utility ground. This may be desired when an AC generator
is connected to the power supply, because the chassis ground through the line cord is
removed when the line cord is plugged into the generator.
• V SEL (Voltage Select): The voltage select jumper can be confi gured for either the 63V
output or the 48V output. The voltage values may vary between models.
Fig. 1-2, VMX Terminal Block Overview
NOTE:
If using the Alpha SPI with the VMX power supply, cut the Anderson connector off of the SPI and strip the
wires 3/8" and connect them to the output terminal.
LRI
AUX OUT
Voltage Select (VSEL) Jumper
Ground Lug
Voltage Out: Modular Ouput Terminal